In cooperation with various government regulatory agencies, HP has announced an expansion of its June 2016 worldwide voluntary safety recall and replacement program for certain notebook batteries. Additional batteries are affected.

Re: HP6400 Laptop Screen nearly totaly washed out

I have the same exact problem.Except my started when water spilled on top of the closed laptop that was on. I quickly dried it off, shut it down and pulled the battery. I then left it on top of the boiler for 5 days to make sure it was dry. It didn’t appear that any water got inside, but I guess a little must have.Now its seem sporadic that the screen will be fine and work for hours without problem, but then the screen will seem to get brighter and brighter and become washout to the point where not much can be seen. I found I can drop the gamma as low as it can go and it isn’t bad, but the colors off and well sometimes the screen works normally. Also I’ve hooked it to a second monitor and it works fine.I suppose I should also not that my right click button doesn’t work anymore either. But that’s a completely separate issue, I think.So I was wondering if you found an answer, I’m not opposed to replacing a part, I just don’t know which of if it’s the LCD panel, backlight control circuit or inverter.Thanks for your help.